Searching for a Ditto to complete the Special Research task that gets you one step closer to a Mew? Here’s a list of the Pokémon you need to be looking for.
Unfortunately, you won’t know if a Pokémon is a Ditto in disguise until after you’ve caught it. When you do find one, “Oh?” will appear and a Ditto will emerge.
Although it’s been tough in the past to find a Ditto, the spawn rate for him has been greatly increased with the addition of the new Research feature, now making this once inefficient task now achievable in a relatively small amount of time.
Good luck in your search.